4240221 has 8 divisors (see below), whose sum is σ = 5722080. Its totient is φ = 2792592.

The previous prime is 4240219. The next prime is 4240267. The reversal of 4240221 is 1220424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4240221 - 2¹ = 4240219 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4240221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4240421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8266 + ... + 8763.

It is an arithmetic number, because the mean of its divisors is an integer number (715260).

Almost surely, 2^4240221 is an apocalyptic number.

It is an amenable number.

4240221 is a deficient number, since it is larger than the sum of its proper divisors (1481859).

4240221 is a wasteful number, since it uses less digits than its factorization.

4240221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17115.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 4240221 is about 2059.1796910420. The cubic root of 4240221 is about 161.8562587189.

Adding to 4240221 its reverse (1220424), we get a palindrome (5460645).

The spelling of 4240221 in words is "four million, two hundred forty thousand, two hundred twenty-one".